[X Newbies] "...disk is in use" But by what process??

[Jerry Krinock]

on 03/05/20 06:46, James S Jones at jsjones at mac.com wrote:

> The solution is to close
[you mean "quit".  This is Apple country. ]
> the application that was launched by opening a
> file on the disk (that refuses to be ejected). Quit Acrobat Reader,
> etc, and the disk is no longer in use. If the reader app had already
> been running when the file on the disk was opened, you will not have
> this problem.

This is interesting, James.  I think I have may have seen this behavior,
which I would describe as a bug in the OS.  In my opinion, closing all
document windows currently accessing documents stored on a mounted disk
should be sufficient to allow that disk to be ejected.  We should not have
to quit an app just because it happened to have been launched by
doubleclicking a document on the mounted disk.  That could have been weeks
ago, and the document closed days ago.

I'm still looking for a non-brute-force method of finding out which app or
document is keeping a disk from being ejected.